Causal agent
un. 致病因子；致病病原\\n
🧩 词语组成解析
causal
['kɔ:zəl]
adj. 具有因果关系的，构成原因的;
🗣️ 情景例句
For a year or two
在一两年内
David would get up early in the morning to deliver newspaper.
戴维一早起床就去送报纸。
We can make a fire and warm ourselves, I suggested.
“我们可以生火取暖，”我说道。